CN218976422U - Radial magnetic field single-phase alternating-current permanent magnet brushless motor - Google Patents

Abstract

The utility model provides a radial magnetic field single-phase alternating current permanent magnet brushless motor, which is different from a common single-phase alternating current motor, wherein a motor stator is formed by superposing silicon steel sheets, the inside of which is cylindrical and is provided with armature grooves and armature teeth for winding, a cylindrical rotor is radially provided with permanent magnets with magnetic force lines perpendicular to a motor rotating shaft, the magnetic force lines generated by the stator and the rotor are perpendicular to a motor shaft, the stator and the rotor can be directly used on the single-phase alternating current power supply without a driver, and speed regulation can also be carried out through a frequency converter. The energy conservation and emission reduction are realized on the daily industrial power application, and the method has wide application prospect.

Description

Radial magnetic field single-phase alternating-current permanent magnet brushless motor

The utility model discloses a radial magnetic field single-phase alternating current permanent magnet brushless motor.

Technical Field

The utility model relates to the technical field of single-phase alternating current motors.

The background technology is as follows:

the radial magnetic field single-phase alternating current permanent magnet brushless motor is a novel product for converting electric energy into mechanical energy.

A single-phase AC motor is a typical main mode for converting electric energy into mechanical energy in industrial application, and is characterized in that a cylindrical stator is wound with a phase or two-phase winding coil, when single-phase AC passes through the motor, a rotating magnetic field is generated, current is induced on a squirrel-cage rotor and a magnetic field on the rotor is generated, the magnetic fields of the stator and the rotor interact to drive the rotor to rotate, and mechanical energy is output, but due to low efficiency and poor running performance, the motor is only manufactured into small-sized and miniature series single-phase asynchronous motors.

Disclosure of Invention

In the radial magnetic field single-phase alternating current permanent magnet brushless motor, a mode that magnetic force lines of a stator and a rotor are perpendicular to a cylindrical rotor rotating shaft is adopted, a permanent magnet on the rotor is radially arranged on a rotor cylinder, the magnetic force lines of the rotor are perpendicular to the rotor rotating shaft, a motor stator is formed by superposing a silicon steel sheet, the inside of which is cylindrical and is provided with an armature groove for winding and an armature tooth, a winding mode of a stator coil on the motor stator is wound around two tooth grooves of the armature tooth in a concentrated mode, the magnetic force lines generated by the stator and the rotor are perpendicular to a motor shaft, two groups of windings are adjacently wound on the stator, one group of windings is connected with a capacitor in series, the motor stator can be directly used on a single-phase alternating current power supply without a driver, the motor can also be used for speed regulation through a frequency converter, and compared with the traditional single-phase alternating current motor, the motor power and torque are improved, and all north poles of the magnetic rotor with the permanent magnet are driven in the same specification, the torque is increased, the driving power is increased, and the use of a copper wire for winding coil is reduced, so the radial magnetic field single-phase alternating current permanent magnet brushless motor is named.

The radial magnetic field single-phase alternating current permanent magnet brushless motor can also be regulated by the single-phase alternating current frequency converter with adjustable output frequency, two alternating current power lines output by the single-phase alternating current frequency converter are connected to two phase lines of the radial magnetic field single-phase alternating current permanent magnet brushless motor, and the frequency of single-phase alternating current output by the frequency converter is changed, so that the aim of regulating the rotating speed is fulfilled.

Drawings

Fig. 1 is a schematic diagram of the stator and rotor structure of a radial magnetic field single-phase ac permanent magnet brushless motor of the utility model.

Fig. 2 is a schematic diagram of a radial magnetic field single-phase ac permanent magnet brushless motor rotor structure according to the utility model.

Fig. 3 is a schematic illustration of a single phase 12 teeth stator winding.

Fig. 4 is a winding diagram showing only one phase winding (U-phase) on the stator with fig. 3 broken away for ease of understanding.

Fig. 5 is a connection of two phase windings of a motor stator.

Fig. 6 is a graph of magnetic fields generated by two-phase drive currents and driving a rotor when the V-phase current is 0 degrees.

Fig. 7 is a diagram of the magnetic field generated by the two-phase drive current and the drive to the rotor when the V-phase current is 30 degrees.

Fig. 8 is a graph of magnetic fields generated by two-phase drive currents and driving a rotor when the V-phase current is 60 degrees.

Fig. 9 is a diagram of the magnetic field generated by the two-phase drive current and the drive to the rotor when the V-phase current is 90 degrees.

Fig. 10 is a graph of magnetic fields generated by two-phase drive currents and driving a rotor when the V-phase current is 120 degrees.

Fig. 11 is a graph of magnetic field generated by a two-phase drive current and drive to a rotor when the V-phase current is 150 degrees.

Fig. 12 is a graph of magnetic fields generated by two-phase drive currents and driving a rotor when the V-phase current is 180 degrees.

Fig. 13 is a graph of magnetic field generated by a two-phase drive current and a drive to a rotor when the V-phase current is 210 degrees.

Fig. 14 is a diagram of the magnetic field generated by the two-phase drive current and the drive to the rotor when the V-phase current is 240 degrees.

Fig. 15 is a diagram of the magnetic field generated by the two-phase drive current and the drive to the rotor when the V-phase current is 270 degrees.

Fig. 16 is a diagram of the magnetic field generated by the two-phase drive current and the drive to the rotor when the V-phase current is 300 degrees.

Fig. 17 is a diagram of the magnetic field generated by the two-phase drive current and the drive to the rotor when the V-phase current is 330 degrees.

Fig. 18 is a diagram of motor winding connections during capacitor start mode operation.

Detailed Description

The utility model relates to a radial magnetic field single-phase alternating current permanent magnet brushless motor, wherein a motor stator of the radial magnetic field single-phase alternating current permanent magnet brushless motor is formed by superposing silicon steel sheets, the inside of which is cylindrical and is provided with armature grooves for winding wires and armature teeth, two-phase stator windings are wound on the stator armature teeth in a centralized winding mode, namely, the armature grooves around two sides of a single armature tooth are wound, two adjacent coils of the same-phase winding are wound in opposite directions, one armature tooth is arranged between two adjacent coils of the same-phase winding, and the winding modes of the two-phase stator windings are the same and are arranged adjacent to the armature teeth. The magnetic force lines generated by the windings on the stator after being electrified are perpendicular to the rotating shaft of the motor, a radial magnetic field is generated, and south pole magnetic poles and north pole magnetic poles are respectively generated on each armature tooth of the stator, and the two-phase stator windings are driven by a single-phase alternating current power supply.

The cylindrical permanent magnet rotor of the motor of the radial magnetic field single-phase alternating-current permanent magnet brushless motor is formed by arranging a permanent magnet ring with magnetic force lines perpendicular to the motor rotating shaft along the motor rotating shaft direction in the outer radial direction and magnetizing the permanent magnet ring according to the outer radial direction, or by arranging a permanent magnet on a rotor body of the cylindrical rotor along the motor rotating shaft direction in a mode that the magnetic force lines of the permanent magnet are perpendicular to the motor rotating shaft direction, wherein magnetic poles generated by the permanent magnets on the cylindrical permanent magnet rotor form a radial magnetic field in the outer radial direction and are adjacently arranged according to south poles and north poles.

The relationship between the number of magnetic poles of a cylindrical permanent magnet rotor of the radial magnetic field single-phase alternating-current permanent magnet brushless motor in the outer radial direction and the number of stator armature slots is as follows: the number of stator armature slots is equal to the sum of the number of poles of the south and north poles of the cylindrical permanent magnet rotor in the outer radial direction multiplied by 2. As can be seen in fig. 1, the number of slots is equal to 6 by 2, and is 12 slots, taking 6 magnets as an example of three north poles and three south poles on the rotor; if a total of 12 poles are used, with six north poles and six south poles, the number of slots is equal to 12 by 2 and 24 slots.

In the present utility model, one ends of the two-phase stator windings are connected together (as shown in fig. 5) and connected to one power line of a single-phase ac power supply; in the capacitor operation mode, the other end of one phase winding of the two phase windings is connected with one operation capacitor in series and then connected with the other end of the other phase winding, and then the other end of the two phase windings is connected with the other power line of the single phase alternating current power supply, as can be seen in fig. 5, one capacitor C is connected in series in the U phase in fig. 5, L and N are the live wire and the zero wire of the single phase alternating current power supply in the drawing, and are respectively two power lines of the single phase alternating current power supply, the drawing is a current diagram of the single phase alternating current power supply and a diagram that a split phase is a two-phase current through the capacitor C in series, the U phase current leads the V phase current to be 90 degrees, when the single phase alternating current is supplied, each armature tooth under the two phase windings respectively generates a south pole and a north pole, and a rotating magnetic field is generated along with the change of the current phases of the U phase and the V phase, the rotating magnetic field enables the magnetic poles of a permanent magnet facing the armature tooth on the stator to generate a repulsive force (same as a south pole and same as the north pole and is mutually repulsive), attractive force is generated along with the north pole on the rotor, and the like, and the rotating magnetic field is further driven to change along with the rotation direction of the north pole.

Fig. 1 is a schematic diagram of a radial magnetic field single-phase alternating-current permanent magnet brushless motor stator and rotor structure, M1 is a rotor provided with permanent magnets in the radial direction, magnetic lines of force are distributed in the radial direction, S1, S2, S3, N1, N2 and N3 on M1 are south poles and north poles of the permanent magnets, and the permanent magnets are arranged adjacently with the poles of the permanent magnets in the south poles and the north poles. The stator is composed of magnetic conductor material, the inside of the stator is cylindrical, the armature slot for winding and the silicon steel sheet of the armature teeth are overlapped, magnetic force lines generated by the stator and the rotor are perpendicular to a rotating shaft of the motor, two-phase stator windings are wound between the armature teeth, X1 to X24 are winding coils wound around the armature teeth on the stator, and the armature teeth are shown as 1 to 12.

Fig. 2 is a schematic diagram of a rotor structure of a radial magnetic field single-phase alternating-current permanent magnet brushless motor of the utility model, M1 is a rotor provided with permanent magnets in the radial direction, magnetic lines of force are distributed in the radial direction, S1, S2, S3, N1, N2 and N3 on M1 are south poles and north poles of the permanent magnets in the radial direction outside the rotor, and the permanent magnets are arranged with the poles arranged adjacently in the south pole and the north pole on the installation, and the rotor generates a radial magnetic field.

Fig. 3 is a schematic diagram of a stator with 12 single-phase teeth wound in a concentrated manner, wherein the coils are wound in a concentrated manner, and the winding directions are shown by arrows in the figure, and the winding directions are shown by starting from U1, and after the winding from the armature slot in the middle of the teeth 1 and 12 to the armature slot in the middle of the teeth 2 and 1 is clockwise, the armature slot in the middle of the teeth 4 and 3 is wound to the armature slot in the middle of the teeth 3 and 2 in a counter-needle manner after being separated by one tooth 2, and then the armature slot in the middle of the teeth 5 and 4 is wound to the armature slot in the middle of the teeth 6 and 5 in a clockwise manner, and the winding directions of two adjacent coils of the same phase are opposite until the winding is completed, and the two coils are separated by one tooth. When current flows from U1 to U2, the teeth US and UN are respectively the south and north poles S and N produced in the teeth, and the same meaning is true for the V phase, it can be seen that winding of the V phase starts in the adjacent groove of the U phase (intermediate the teeth 1 and 2), and the V phases of the U phase are arranged adjacently.

Fig. 4 is a drawing showing the winding of one phase winding (U-phase) on the stator with the drawing broken away for ease of understanding, and the arrow on the drawing also shows the winding direction, when current flows from u+ to U-, on the teeth US and UN are the south pole S and north pole N respectively generated at the teeth.

The utility model relates to a radial magnetic field single-phase alternating current permanent magnet brushless motor stator winding, which is wound by adopting a double-side tooth socket which surrounds an armature tooth in a centralized way, and the winding directions of two adjacent coils of the same phase winding are opposite, the adjacent coils of the same phase winding are separated by the armature tooth, magnetic force lines generated by a stator and a rotor are perpendicular to a motor shaft, two groups of windings are adjacently wound on the stator, and one ends of the two phase windings are connected together for conducting intercommunication and are connected to a power line of single-phase alternating current; the other end of one phase winding of the two-phase windings is connected with one capacitor in series and then connected with the other end of the other phase winding, and then connected with the other power line of the single-phase alternating current. Can be directly used on a single-phase alternating current power supply without a driver.

Fig. 5 shows a connection of two-phase windings of a stator of an electric motor, a capacitor C is connected in series to a U-phase, and L and N are the live and neutral wires of a single-phase ac power supply, a current diagram of the single-phase ac power supply and a diagram of split phase into two-phase currents after the capacitor C is connected in series, the U-phase current is advanced by 90 degrees to the V-phase current, and the following description is developed based on the two-phase currents.

The following analyses are performed on the magnetic pole changes generated on the armature teeth of the stator and the acting force of the permanent magnet field on the rotor by combining the respective phase changes of the radial magnetic field single-phase alternating-current permanent magnet brushless motor on the single-phase alternating current with fig. 6 to 17, so as to describe the principle and the acting mechanism of the motor.

In fig. 6 to 17, arrows on the respective windings indicate the current direction, flowing from the positive electrode a+ into the negative electrode a-out; the broken lines in each figure represent the direction of magnetic lines from north to south, so as to show the magnetic line condition of the upper two-phase alternating current (single-phase alternating current is regarded as two-phase alternating current through capacitor phase splitting so as to describe the condition of each phase) at each phase, we have intentionally drawn the rotor smaller to show the situation of the magnetic lines of force at this phase. For theoretical analysis, the magnetic poles of the stator and the rotor can be equivalent to a certain point, and the method is commonly adopted as a common method in electrodynamics. In addition, for clarity, we have hidden from view the corresponding figures for phases with no current flowing (phases at 90, 180, 360 degrees). The dashed lines in each figure represent the magnetic field lines generated by the stator teeth from north to south.

To facilitate understanding we use the U, V symbol commonly used for brushless motors to represent two-phase alternating current.

The stator rotor pole drive at each drive instant is described below in units of 30 degrees (the magnitude of the magnetic field strength on the armature teeth is normalized to a maximum value of 1 and is equal to the current value, when the current value is negative, the poles are reversed), the south pole magnetism generated on each armature tooth by the U-phase winding is denoted by US, the north pole magnetism generated on each armature tooth by the U-phase winding is denoted by UN, the south pole magnetism generated on each armature tooth by the V-phase winding is denoted by VS, the north pole magnetism generated on each armature tooth by the V-phase winding is denoted by VN, the values of which are marked before and described by the V-phase as a phase reference.

In the following figures 6 to 17, the so-called "left" and "right" are defined in terms of the left and right positions of the centre of the teeth 7 so as to unify the directions of view, the stator teeth being drawn with slightly thinner lines to highlight the magnetic field variations on the teeth for clarity.

At 0 degree, as shown in fig. 6, the U phase is 90 degrees, and the magnetic field strength is 1; v phase is 0 degree, and its magnetic field intensity is 0; the V phase has no current passing through it, and current flows in from U1 and out through U2, creating the magnetic pole and strength shown in fig. 6. The stator south pole is synthesized in the middle of the armature teeth 1 to push the rotor magnetic pole south pole S1 to rotate anticlockwise, and the north pole is synthesized in the middle of the armature teeth 3 to also attract the rotor magnetic pole south pole S1 to rotate anticlockwise; the north pole in the armature teeth 3 also pushes the rotor magnetic pole north pole N1 to rotate anticlockwise, and the south pole synthesized in the middle of the armature teeth 5 by the stator also attracts the rotor magnetic pole north pole N1 to rotate anticlockwise; the stator south pole is synthesized in the middle of the armature teeth 5 to push the rotor magnetic pole south pole S2 to rotate anticlockwise, and the north pole is synthesized in the middle of the armature teeth 7 to also attract the rotor magnetic pole south pole S2 to rotate anticlockwise; the north pole in the armature teeth 7 also pushes the rotor magnetic pole north pole N2 to rotate anticlockwise, and the south pole synthesized in the middle of the armature teeth 9 by the stator also attracts the rotor magnetic pole north pole N2 to rotate anticlockwise; the stator south pole is synthesized in the middle of the armature teeth 9 to push the rotor magnetic pole south pole S3 to rotate anticlockwise, and the north pole is synthesized in the middle of the armature teeth 11 to also attract the rotor magnetic pole south pole S3 to rotate anticlockwise; the north pole in the armature teeth 11 also pushes the rotor magnetic pole north pole N3 to rotate anticlockwise, and the south pole synthesized in the middle of the armature teeth 1 also attracts the rotor magnetic pole north pole N3 to rotate anticlockwise.

At 30 degrees, as shown in FIG. 7, the U phase is 120 degrees, and the magnetic field strength is 0.866; v phase is 30 degrees, and the magnetic field intensity is 0.5; the current flows in from U1 and V1 and out through U2 and V2, creating the magnetic poles and intensities shown in FIG. 7. The stator south pole is synthesized on the right side of the armature teeth 1, the rotor magnetic pole south pole S1 is pushed to rotate anticlockwise, the north pole is synthesized on the right side of the armature teeth 3, and the rotor magnetic pole south pole S1 is also attracted to rotate anticlockwise; the north pole on the right side of the armature teeth 3 also pushes the rotor magnetic pole north pole N1 to rotate anticlockwise, and the south pole synthesized on the right side of the armature teeth 5 by the stator also attracts the rotor magnetic pole north pole N1 to rotate anticlockwise; the stator south pole is synthesized on the right side of the armature teeth 5 to push the rotor magnetic pole south pole S2 to rotate anticlockwise, and the north pole is synthesized on the right side of the armature teeth 7 to also attract the rotor magnetic pole south pole S2 to rotate anticlockwise; the north pole on the right side of the armature teeth 7 also pushes the rotor magnetic pole north pole N2 to rotate anticlockwise, and the south pole synthesized on the right side of the armature teeth 9 by the stator also attracts the rotor magnetic pole north pole N2 to rotate anticlockwise; the stator south pole is synthesized on the right side of the armature teeth 9 to push the rotor magnetic pole south pole S3 to rotate anticlockwise, and the north pole is synthesized on the right side of the armature teeth 11 to also attract the rotor magnetic pole south pole S3 to rotate anticlockwise; the north pole on the right side of the armature teeth 11 also pushes the rotor magnetic pole north pole N3 to rotate anticlockwise, and the south pole synthesized on the right side of the armature teeth 1 by the stator also attracts the rotor magnetic pole north pole N3 to rotate anticlockwise.

At 60 degrees, as shown in FIG. 8, the U phase is 150 degrees, and the magnetic field strength is 0.5; v phase is 60 degrees, and the magnetic field intensity is 0.886; the current flows in from U1 and V1 and out through U2 and V2, creating the magnetic poles and intensities shown in FIG. 8. The stator south pole is synthesized on the left side of the armature teeth 2 to push the rotor magnetic pole south pole S1 to rotate anticlockwise, and the north pole is synthesized on the left side of the armature teeth 4 to also attract the rotor magnetic pole south pole S1 to rotate anticlockwise; the north pole on the left side of the armature teeth 4 also pushes the rotor magnetic pole north pole N1 to rotate anticlockwise, and the south pole synthesized on the left side of the armature teeth 6 by the stator also attracts the rotor magnetic pole north pole N1 to rotate anticlockwise; the stator south pole is synthesized on the left side of the armature teeth 6 to push the rotor magnetic pole south pole S2 to rotate anticlockwise, and the north pole is synthesized on the left side of the armature teeth 8 to also attract the rotor magnetic pole south pole S2 to rotate anticlockwise; the north pole on the left side of the armature teeth 8 also pushes the rotor magnetic pole north pole N2 to rotate anticlockwise, and the south pole synthesized on the left side of the armature teeth 10 by the stator also attracts the rotor magnetic pole north pole N2 to rotate anticlockwise; the stator south pole is synthesized on the left side of the armature teeth 10, the rotor magnetic pole south pole S3 is pushed to rotate anticlockwise, and the north pole is synthesized on the left side of the armature teeth 12, and the rotor magnetic pole south pole S3 is also attracted to rotate anticlockwise; the north pole on the left of the armature teeth 12 also pushes the rotor magnetic pole north pole N3 to rotate anticlockwise, and the south pole synthesized on the left of the armature teeth 2 by the stator also attracts the rotor magnetic pole north pole N3 to rotate anticlockwise.

At 90 degrees, as shown in fig. 9, the U phase is 180 degrees, and the magnetic field strength is 0; the V phase is 90 degrees, and the magnetic field intensity is 1; the U phase has no current passing through it, and current flows in from V1 and out through V2, creating the magnetic pole and strength shown in fig. 9. The stator south pole is synthesized in the middle of the armature teeth 2 to push the rotor magnetic pole south pole S1 to rotate anticlockwise, and the north pole is synthesized in the middle of the armature teeth 4 to also attract the rotor magnetic pole south pole S1 to rotate anticlockwise; the north pole in the armature teeth 4 also pushes the rotor magnetic pole north pole N1 to rotate anticlockwise, and the south pole synthesized in the middle of the armature teeth 6 of the stator also attracts the rotor magnetic pole north pole N1 to rotate anticlockwise; the stator south pole is synthesized in the middle of the armature teeth 6 to push the rotor magnetic pole south pole S2 to rotate anticlockwise, and the north pole is synthesized in the middle of the armature teeth 8 to also attract the rotor magnetic pole south pole S2 to rotate anticlockwise; the north pole in the armature teeth 8 also pushes the rotor magnetic pole north pole N2 to rotate anticlockwise, and the south pole synthesized in the middle of the armature teeth 10 of the stator also attracts the rotor magnetic pole north pole N2 to rotate anticlockwise; the stator south pole is synthesized in the middle of the armature teeth 10 to push the rotor magnetic pole south pole S3 to rotate anticlockwise, and the north pole is synthesized in the middle of the armature teeth 12 to also attract the rotor magnetic pole south pole S3 to rotate anticlockwise; the north pole in the armature teeth 12 also pushes the rotor magnetic pole north pole N3 to rotate in the counterclockwise direction, and the south pole synthesized in the middle of the armature teeth 2 of the stator also attracts the rotor magnetic pole north pole N3 to rotate in the counterclockwise direction.

At 120 degrees, as shown in FIG. 10, the U phase is 210 degrees, and the magnetic field strength is-0.5; the V phase is 120 degrees, and the magnetic field intensity is 0.886; the current flows in from U2 and V1 and out through U1 and V2, producing the magnetic poles and intensities shown in FIG. 10. The stator south pole is synthesized on the right side of the armature teeth 2, the rotor magnetic pole south pole S1 is pushed to rotate anticlockwise, the north pole is synthesized on the right side of the armature teeth 4, and the rotor magnetic pole south pole S1 is also attracted to rotate anticlockwise; the north pole on the right side of the armature teeth 4 also pushes the rotor magnetic pole north pole N1 to rotate anticlockwise, and the south pole synthesized on the right side of the armature teeth 6 by the stator also attracts the rotor magnetic pole north pole N1 to rotate anticlockwise; the stator south pole is synthesized on the right side of the armature teeth 6 to push the rotor magnetic pole south pole S2 to rotate anticlockwise, and the north pole is synthesized on the right side of the armature teeth 8 to also attract the rotor magnetic pole south pole S2 to rotate anticlockwise; the north pole on the right side of the armature teeth 8 also pushes the rotor magnetic pole north pole N2 to rotate anticlockwise, and the south pole synthesized on the right side of the armature teeth 10 by the stator also attracts the rotor magnetic pole north pole N2 to rotate anticlockwise; the stator south pole is synthesized on the right side of the armature teeth 10, the rotor magnetic pole south pole S3 is pushed to rotate anticlockwise, the north pole is synthesized on the right side of the armature teeth 12, and the rotor magnetic pole south pole S3 is also attracted to rotate anticlockwise; the north pole on the right side of the armature teeth 12 also pushes the rotor magnetic pole north pole N3 to rotate anticlockwise, and the south pole synthesized on the right side of the armature teeth 2 by the stator also attracts the rotor magnetic pole north pole N3 to rotate anticlockwise.

At 150 degrees, as shown in FIG. 11, the U phase is 240 degrees, and the magnetic field strength is-0.886; the V phase is 150 degrees, and the magnetic field strength is 0.5; the current flows in from U2 and V1 and out through U1 and V2, creating the magnetic poles and intensities shown in FIG. 11. The stator south pole is synthesized on the left side of the armature teeth 3 to push the rotor magnetic pole south pole S1 to rotate anticlockwise, and the north pole is synthesized on the left side of the armature teeth 5 to also attract the rotor magnetic pole south pole S1 to rotate anticlockwise; the north pole on the left side of the armature teeth 5 also pushes the rotor magnetic pole north pole N1 to rotate anticlockwise, and the south pole synthesized on the left side of the armature teeth 7 by the stator also attracts the rotor magnetic pole north pole N1 to rotate anticlockwise; the stator south pole is synthesized on the left side of the armature teeth 7 to push the rotor magnetic pole south pole S2 to rotate anticlockwise, and the north pole is synthesized on the left side of the armature teeth 9 to also attract the rotor magnetic pole south pole S2 to rotate anticlockwise; the north pole on the left side of the armature teeth 9 also pushes the rotor magnetic pole north pole N2 to rotate anticlockwise, and the south pole synthesized on the left side of the armature teeth 11 by the stator also attracts the rotor magnetic pole north pole N2 to rotate anticlockwise; the stator south pole is synthesized on the left side of the armature teeth 11 to push the rotor magnetic pole south pole S3 to rotate anticlockwise, and the north pole is synthesized on the left side of the armature teeth 1 to also attract the rotor magnetic pole south pole S3 to rotate anticlockwise; the north pole on the left side of the armature teeth 1 also pushes the rotor magnetic pole north pole N3 to rotate anticlockwise, and the south pole synthesized on the left side of the armature teeth 3 by the stator also attracts the rotor magnetic pole north pole N3 to rotate anticlockwise.

180 degrees, as shown in FIG. 12, the U phase is 270 degrees, and the magnetic field strength is-1; the V phase is 180 degrees, and the magnetic field intensity is 0; the V-phase has no current passing through it, and current flows in from U2 and out through U1, creating the magnetic pole and strength shown in fig. 12. The stator south pole is synthesized in the middle of the armature teeth 3 to push the rotor magnetic pole south pole S1 to rotate anticlockwise, and the north pole is synthesized in the middle of the armature teeth 5 to also attract the rotor magnetic pole south pole S1 to rotate anticlockwise; the north pole in the armature teeth 5 also pushes the rotor magnetic pole north pole N1 to rotate anticlockwise, and the south pole synthesized in the middle of the armature teeth 7 of the stator also attracts the rotor magnetic pole north pole N1 to rotate anticlockwise; the stator south pole is synthesized in the middle of the armature teeth 7 to push the rotor magnetic pole south pole S2 to rotate anticlockwise, and the north pole is synthesized in the middle of the armature teeth 9 to also attract the rotor magnetic pole south pole S2 to rotate anticlockwise; the north pole in the armature teeth 9 also pushes the rotor magnetic pole north pole N2 to rotate anticlockwise, and the south pole synthesized in the middle of the armature teeth 11 of the stator also attracts the rotor magnetic pole north pole N2 to rotate anticlockwise; the stator south pole is synthesized in the middle of the armature teeth 11 to push the rotor magnetic pole south pole S3 to rotate anticlockwise, and the north pole is synthesized in the middle of the armature teeth 1 to also attract the rotor magnetic pole south pole S3 to rotate anticlockwise; the north pole in the armature teeth 1 also pushes the rotor magnetic pole north pole N3 to rotate anticlockwise, and the south pole synthesized in the middle of the armature teeth 3 also attracts the rotor magnetic pole north pole N3 to rotate anticlockwise.

At 210 degrees, as shown in FIG. 13, the U phase is 300 degrees, and the magnetic field strength is-0.886; v phase is 210 degrees, and the magnetic field intensity is-0.5; the current flows in from U2 and V2 and out through U1 and V1, creating the magnetic poles and intensities shown in FIG. 13. The stator south pole is synthesized on the right side of the armature teeth 3, the rotor magnetic pole south pole S1 is pushed to rotate anticlockwise, the north pole is synthesized on the right side of the armature teeth 5, and the rotor magnetic pole south pole S1 is also attracted to rotate anticlockwise; the north pole on the right side of the armature teeth 5 also pushes the rotor magnetic pole north pole N1 to rotate anticlockwise, and the south pole synthesized on the right side of the armature teeth 7 by the stator also attracts the rotor magnetic pole north pole N1 to rotate anticlockwise; the stator south pole is synthesized on the right side of the armature teeth 7, the rotor magnetic pole south pole S2 is pushed to rotate anticlockwise, the north pole is synthesized on the right side of the armature teeth 9, and the rotor magnetic pole south pole S2 is also attracted to rotate anticlockwise; the north pole on the right side of the armature teeth 9 also pushes the rotor magnetic pole north pole N2 to rotate anticlockwise, and the south pole synthesized on the right side of the armature teeth 11 by the stator also attracts the rotor magnetic pole north pole N2 to rotate anticlockwise; the stator south pole is synthesized on the right side of the armature teeth 11, the rotor magnetic pole south pole S3 is pushed to rotate anticlockwise, the north pole is synthesized on the right side of the armature teeth 1, and the rotor magnetic pole south pole S3 is also attracted to rotate anticlockwise; the north pole on the right side of the armature teeth 1 also pushes the rotor magnetic pole north pole N3 to rotate anticlockwise, and the south pole synthesized on the right side of the armature teeth 3 also attracts the rotor magnetic pole north pole N3 to rotate anticlockwise.

At 240 degrees, as shown in FIG. 14, the U phase is 330 degrees, and the magnetic field strength is-0.5; the V phase is 240 degrees, and the magnetic field intensity is-0.886; the current flows in from U2 and V2 and out through U1 and V1, creating the magnetic poles and intensities shown in FIG. 14. The stator south pole is synthesized on the left side of the armature teeth 4 to push the rotor magnetic pole south pole S1 to rotate anticlockwise, and the north pole is synthesized on the left side of the armature teeth 6 to also attract the rotor magnetic pole south pole S1 to rotate anticlockwise; the north pole on the left side of the armature teeth 6 also pushes the rotor magnetic pole north pole N1 to rotate anticlockwise, and the south pole synthesized on the left side of the armature teeth 8 by the stator also attracts the rotor magnetic pole north pole N1 to rotate anticlockwise; the stator south pole is synthesized on the left side of the armature teeth 8 to push the rotor magnetic pole south pole S2 to rotate anticlockwise, and the north pole is synthesized on the left side of the armature teeth 10 to also attract the rotor magnetic pole south pole S2 to rotate anticlockwise; the north pole on the left side of the armature teeth 10 also pushes the rotor magnetic pole north pole N2 to rotate anticlockwise, and the south pole synthesized on the left side of the armature teeth 12 by the stator also attracts the rotor magnetic pole north pole N2 to rotate anticlockwise; the stator south pole is synthesized on the left side of the armature teeth 12 to push the rotor magnetic pole south pole S3 to rotate anticlockwise, and the north pole is synthesized on the left side of the armature teeth 2 to also attract the rotor magnetic pole south pole S3 to rotate anticlockwise; the north pole on the left side of the armature teeth 2 also pushes the rotor magnetic pole north pole N3 to rotate anticlockwise, and the south pole synthesized on the left side of the armature teeth 4 by the stator also attracts the rotor magnetic pole north pole N3 to rotate anticlockwise.

At 270 degrees, as shown in fig. 15, the U phase is 360 degrees, and the magnetic field strength is 0; the V phase is 270 degrees, and the magnetic field intensity is-1; the U phase has no current passing through it, and current flows in from V2 and out through V1, creating the magnetic pole and strength shown in fig. 15. The stator south pole is synthesized in the middle of the armature teeth 4 to push the rotor magnetic pole south pole S1 to rotate anticlockwise, and the north pole is synthesized in the middle of the armature teeth 6 to also attract the rotor magnetic pole south pole S1 to rotate anticlockwise; the north pole in the armature teeth 6 also pushes the rotor magnetic pole north pole N1 to rotate anticlockwise, and the south pole synthesized in the middle of the armature teeth 8 of the stator also attracts the rotor magnetic pole north pole N1 to rotate anticlockwise; the stator south pole is synthesized in the middle of the armature teeth 8 to push the rotor magnetic pole south pole S2 to rotate anticlockwise, and the north pole is synthesized in the middle of the armature teeth 10 to also attract the rotor magnetic pole south pole S2 to rotate anticlockwise; the north pole in the armature teeth 10 also pushes the rotor magnetic pole north pole N2 to rotate anticlockwise, and the south pole synthesized in the middle of the armature teeth 12 of the stator also attracts the rotor magnetic pole north pole N2 to rotate anticlockwise; the stator south pole is synthesized in the middle of the armature teeth 12 to push the rotor magnetic pole south pole S3 to rotate anticlockwise, and the north pole is synthesized in the middle of the armature teeth 2 to also attract the rotor magnetic pole south pole S3 to rotate anticlockwise; the north pole in the armature teeth 2 also pushes the rotor magnetic pole north pole N3 to rotate anticlockwise, and the south pole synthesized in the middle of the armature teeth 4 also attracts the rotor magnetic pole north pole N3 to rotate anticlockwise.

At 300 degrees, as shown in fig. 16, the U phase is 30 degrees, and the magnetic field strength is 0.5; v phase is 300 degrees, and the magnetic field intensity is-0.886; the current flows in from U1 and V2 and out through U2 and V1, creating the magnetic poles and intensities shown in FIG. 16. The stator south pole is synthesized on the right side of the armature teeth 4 to push the rotor magnetic pole south pole S1 to rotate anticlockwise, and the north pole is synthesized on the right side of the armature teeth 6 to also attract the rotor magnetic pole south pole S1 to rotate anticlockwise; the north pole on the right side of the armature teeth 6 also pushes the rotor magnetic pole north pole N1 to rotate anticlockwise, and the south pole synthesized on the right side of the armature teeth 8 by the stator also attracts the rotor magnetic pole north pole N1 to rotate anticlockwise; the stator south pole is synthesized on the right side of the armature teeth 8 to push the rotor magnetic pole south pole S2 to rotate anticlockwise, and the north pole is synthesized on the right side of the armature teeth 10 to also attract the rotor magnetic pole south pole S2 to rotate anticlockwise; the north pole on the right side of the armature teeth 10 also pushes the rotor magnetic pole north pole N2 to rotate anticlockwise, and the south pole synthesized on the right side of the armature teeth 12 by the stator also attracts the rotor magnetic pole north pole N2 to rotate anticlockwise; the stator south pole is synthesized on the right side of the armature teeth 12, the rotor magnetic pole south pole S3 is pushed to rotate anticlockwise, the north pole is synthesized on the right side of the armature teeth 2, and the rotor magnetic pole south pole S3 is also attracted to rotate anticlockwise; the north pole on the right side of the armature teeth 2 also pushes the rotor magnetic pole north pole N3 to rotate anticlockwise, and the south pole synthesized on the right side of the armature teeth 4 by the stator also attracts the rotor magnetic pole north pole N3 to rotate anticlockwise.

At 330 degrees, as shown in fig. 17, the U phase is 60 degrees, and the magnetic field strength is 0.886; v phase is 330 degrees, and the magnetic field intensity is-0.5; the current flows in from U1 and V2 and out through U2 and V1, creating the magnetic poles and intensities shown in FIG. 17. The stator south pole is synthesized on the left side of the armature teeth 5 to push the rotor magnetic pole south pole S1 to rotate anticlockwise, and the north pole is synthesized on the left side of the armature teeth 7 to also attract the rotor magnetic pole south pole S1 to rotate anticlockwise; the north pole on the left side of the armature teeth 7 also pushes the rotor magnetic pole north pole N1 to rotate anticlockwise, and the south pole synthesized on the left side of the armature teeth 9 by the stator also attracts the rotor magnetic pole north pole N1 to rotate anticlockwise; the stator south pole is synthesized on the left side of the armature teeth 9 to push the rotor magnetic pole south pole S2 to rotate anticlockwise, and the north pole is synthesized on the left side of the armature teeth 11 to also attract the rotor magnetic pole south pole S2 to rotate anticlockwise; the north pole on the left side of the armature teeth 11 also pushes the rotor magnetic pole north pole N2 to rotate anticlockwise, and the south pole synthesized on the left side of the armature teeth 1 by the stator also attracts the rotor magnetic pole north pole N2 to rotate anticlockwise; the stator south pole is synthesized on the left side of the armature teeth 1, the rotor magnetic pole south pole S3 is pushed to rotate anticlockwise, the north pole is synthesized on the left side of the armature teeth 3, and the rotor magnetic pole south pole S3 is also attracted to rotate anticlockwise; the north pole on the left side of the armature teeth 3 also pushes the rotor magnetic pole north pole N3 to rotate anticlockwise, and the south pole synthesized on the left side of the armature teeth 5 by the stator also attracts the rotor magnetic pole north pole N3 to rotate anticlockwise.

Through the phase change of the two-phase power supply and the caused driving of the permanent magnet on the rotor, the position of the permanent magnet S3 on the rotor is rotated to the position when the V phase is 0 degree, the driving of the complete 360 degrees is completed once, the process is repeated, and the rotor is rotated by three times of complete driving of the electrical angles, so that the rotation of the motor rotor is realized.

From the above process, it can be seen that the rotation speed of the motor rotor is driven by the rotating magnetic field generated by the phase change of the two-phase alternating current, and the speed of the phase change depends on the frequency of the two-phase alternating current, that is, the radial magnetic field single-phase alternating current permanent magnet brushless motor can be adjusted by the frequency converter.

Like the ac motor with single-phase squirrel cage rotor, the radial field single-phase ac permanent magnet brushless motor can also be made into a capacitor operation type as shown in fig. 5 and a capacitor start type as shown in fig. 18, where CY is an operation capacitor, and CQ is a start capacitor, SW is a normally closed centrifugal switch, and the start capacitor CQ is turned off when the rotor rotates to a certain speed. Naturally, the normally closed centrifugal switch may also be replaced by an electronic switch which automatically opens the starting capacitor when the rotor rotates to a certain speed, which is a widely used alternative, but this does not constitute an essential difference.

The utility model provides a winding mode of each phase winding of a radial magnetic field single-phase alternating current permanent magnet brushless motor and drives a motor rotor provided with a permanent magnet under each phase condition when two-phase alternating current is input to achieve the purpose of converting electric energy and mechanical energy by using the two-phase alternating current, wherein the two-phase alternating current is obtained by common daily single-phase alternating current through capacitor phase splitting, and corresponding civil and industrial application is met.

It will be evident to those skilled in the art that the present utility model includes but is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. It should be noted that the permanent magnets on the rotor have many different structural shapes and manufacturing modes, such as ring magnetizing and surface magnetic-attaching sheets, and the like, so long as the magnetic lines of force are perpendicular to the rotating shaft of the motor, but not parallel to the rotating shaft of the motor, the permanent magnets are regarded as motors with the same radial magnetic field mode; for example, in the winding process of a motor winding, a phase winding component is divided into a plurality of windings to be wound in parallel and a plurality of windings to be wound in series for technical consideration, and the phase winding component is regarded as a phase winding.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims (7)

1. The radial magnetic field single-phase alternating current permanent magnet brushless motor comprises a motor stator and a cylindrical permanent magnet rotor, and is characterized in that: the motor stator of the radial magnetic field single-phase alternating-current permanent-magnet brushless motor is formed by superposing silicon steel sheets, the inside of which is cylindrical and is provided with armature grooves for winding wires and armature teeth, two-phase stator windings are wound on the armature teeth, and magnetic force lines generated after the windings on the stator are electrified are vertical to a motor shaft to generate a radial magnetic field; the cylindrical permanent magnet rotor is provided with permanent magnets, the cylindrical permanent magnet rotor also generates a radial magnetic field, when the stator winding is electrified, south pole magnetic poles and north pole magnetic poles are respectively generated on each armature tooth of the stator winding, the magnetic poles facing the rotor on the armature teeth of the stator and the magnetic poles of the permanent magnets facing the armature teeth on the rotor generate a repulsive force pushing away each other according to the like magnetic poles, the opposite magnetic poles generate attractive force pulling up each other to drive each south pole permanent magnet and each north pole permanent magnet on the rotor, and the winding mode of the stator winding is that a rotating magnetic field is generated when single-phase alternating current is electrified so as to drive the rotor to rotate in one direction, and the two-phase stator winding is driven by a single-phase alternating current power supply.

2. The radial field single phase ac permanent magnet brushless motor of claim 1, wherein: the stator winding on the armature teeth of the stator formed by stacking the silicon steel sheets is wound around armature grooves on two sides of a single armature tooth according to a centralized winding method, two adjacent coils of the same phase winding are wound in opposite directions, one armature tooth is separated between the two adjacent coils of the same phase winding, and the winding modes of the two phase stator windings are the same and the adjacent armature teeth are arranged.

3. The radial field single phase ac permanent magnet brushless motor of claim 1, wherein: one end of the two-phase winding is connected together and connected to a power line of the single-phase alternating current power supply; when the capacitor is in an operation mode, the other end of one phase winding of the two-phase winding is connected with one operation capacitor in series and then connected with the other end of the other phase winding, and then connected with the other power line of the single-phase alternating current power supply; a starting capacitor connected in series with a normally-closed centrifugal switch is connected in parallel on the running capacitor in a capacitor starting mode.

4. A radial field single phase ac permanent magnet brushless motor according to claim 3, wherein: the normally closed centrifugal switch comprises an electronic normally closed centrifugal switch.

5. The radial field single phase ac permanent magnet brushless motor of claim 1, wherein: the cylindrical permanent magnet rotor is provided with a permanent magnet ring with magnetic force lines perpendicular to the motor rotating shaft along the motor rotating shaft direction in the outer radial direction, and the permanent magnet ring is magnetized according to the outer radial direction, or the cylindrical permanent magnet rotor is formed by arranging a permanent magnet on a rotor body of the cylindrical rotor along the motor rotating shaft direction in a mode that the magnetic force lines of the permanent magnet are perpendicular to the motor rotating shaft direction, and magnetic poles generated by the permanent magnet on the cylindrical permanent magnet rotor generate radial magnetic fields and are adjacently arranged according to south poles and north poles.

6. The radial field single phase ac permanent magnet brushless motor of claim 1, wherein: the relationship between the number of magnetic poles of the cylindrical permanent magnet rotor of the radial magnetic field single-phase alternating-current permanent magnet brushless motor in the outer radial direction and the number of stator armature slots is as follows: the number of stator armature slots is equal to the sum of the number of poles of the south and north poles of the radial magnetic field outside the cylindrical permanent magnet rotor multiplied by 2.

7. The radial field single phase ac permanent magnet brushless motor of claim 1, wherein: the rotation speed of the motor rotor is regulated by a single-phase alternating current frequency converter capable of changing the output frequency, and two alternating current power lines output by the single-phase alternating current frequency converter are connected to two power lines of the radial magnetic field single-phase alternating current permanent magnet brushless motor.

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